let source = [
    {
        active_id: 1199,
        date: '2021-11-24',
        driver_id: 6834483,
        reward: 40
    },
    {
        active_id: 1199,
        date: '2021-11-24',
        driver_id: 6834483,
        reward: 60
    }
]

let target = [
    {
        active_id: 1199,
        date: '2021-11-24',
        driver_id: 6834483,
        reward: 40
    },
    {
        active_id: 1199,
        date: '2021-11-24',
        driver_id: 6834483,
        reward: 80
    }
]

console.log('source', source, 'target', target, '_', _);
const sourceLen = source.length, targetLen = target.length
// for(let i = 0; i<sourceLen; i++) {
//     for(let j = 0; j<targetLen; j++) {

//     }
// }

// 双指针比对
function diff (source, target) {
    const sourceLen = source.length, targetLen = target.length
    let  pointerS = 0, pointerT = 0
    
}